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Selection of train sampling cars
Author: technological excellence Date: 2019-11-27
When the required number of sub-samples is equal to and less than the number of cars of a sampling unit, each car should take one sub-sample; when the required number of sub-samples is more than the number of cars of a sampling unit, each sub-car The number of samples is equal to the total number of subsamples divided by the number of cars. If there is a remainder after the division, the subsamples should be distributed throughout the sampling unit. Cars with distributed sub-samples can be selected using a systematic method (such as one additional sample every few cars) or a random method.

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